(19)

(11)

EP 0 836 693 A1

(12)

(43) Date of publication: 22.04.1998 Bulletin 1998/17 (21) Application number: 96919463.0 (22) Date of filing: 17.06.1996

(51) International Patent Classification (IPC):  F16L 19/ 028( . ) (86) International application number: PCT/US1996/010447 (87) International publication number: WO 1997/002450 (23.01.1997 Gazette 1997/05)

(84) Designated Contracting States: GB (30) Priority: 05.07.1995 US 19950498119 (71) Applicant: Universal Enterprises, Inc. Mansfield, OH 44906-1280 (US)	(72) Inventor: RIDENOUR, Ralph, G. Mansfield, OH 44903 (US) (74) Representative: W.P. Thompson & Co.  Coopers Building, Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)